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COMPETITION CLUTCH
Stage 4 Sprung - Strip Series 1620 Clutch Kit

This assembly; available with a double spring; six rivet carriage is good for ease of gear transition with higher horsepower. This disc complimented by a performance pressure plate provides up to 250% increase in torque capacity. 300 mile break-in recommended with this set-up.

The 1620 Series kit includes a performance pressure plate; a six puck high torque sprung disc with Ceramic buttons; all applicable bearings; and the appropriate alignment tool.

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Brian Crower high performance camshafts are ground on state-of-the-art CNC cam grinders to insure accuracy and tolerances to within .02mm. Every Brian Crower camshaft profile has been prototyped and dyno tested for proven horsepower results prior to placed into mass production. By grinding cores in high volume; Brian Crower; Inc. is able to pass the cost savings on to the end user. Quality at an affordable price.
Brian Crower uses small diameter grinding wheels during the finishing phase when applicable to generate a more aggressive ramp rate for a faster cylinder fill rate. More air + more fuel = more power. Although it takes longer to grind the cams; research and development has proven that the inverted radius created by the small grinding wheel on the opening side delivers more horsepower on radius and roller rocker applications than the conventional; large diameter grinding wheels.
All Brian Crower cams are checked on a high speed; sub-micron accuracy measuring gauge. The Adcole Camshaft Measuring System uses individual measuring heads for each cam journal and cam lobe; with .01 micron resolution; taking one datum point each 1/10th of a degree or 3;600 data points per revolution. Measuring camshafts for rise error and chattermark detection; this model can measure 200 parts per hour. Learn More

COMPETITION CLUTCH
Stage 5 Rigid - Strip Series 0420 Clutch Kit

This assembly; available with a rigid plate is good for penetrating engagement with higher horsepower applications. This disc complimented by a performance pressure plate provides up to 300% increase in torque capacity. 300 mile break-in recommended with this set-up.

The 0420 Series kit includes a performance pressure plate; a four puck high torque rigid disc with Ceramic buttons; all applicable bearings; and the appropriate alignment tool.

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JRZ Suspension Engineering is proud to offer our newest triple adjustable racing damper. the JRZ 12 31. Building upon the years of success of our original triple adjustable damper. the JRZ 12 31 takes our damping philosophy to the next level. Every adjustment has an increased damping force range with finer adjustments engineered to enable the chassis tuner to make significant predictable changes every time. Compression adjustments are separated into the high speed and low speed piston velocity ranges affecting the bleed and blow off points of the damping curve. All oil flow paths in the JRZ 12 31 have been redesigned to maximize efficiency and give crisp feel to the driver. Rebound valving has been completely redesigned to eliminate influence over compression forces and smooth pressure development. At the heart of the new JRZ 12 31 package is our latest motorsport piston. designed to give increased control over base characteristics. reduce hysteresis. and operate smoother. To ensure that the valving designed into the JRZ 12 31 are the determining forces. JRZ has included new low friction coatings. seals and bearings with this package. Custom applications are available. An easy to use system. the JRZ 12 31 enables the chassis tuner to achieve the desired mass control and handling with precision. Digressive high speed compression blow off adjustment allows for a stiff compression valving while maintaining smooth response and without losing traction. The low speed adjustment is a powerful tool that enables the chassis tuner to maximize grip and optimize vehicle balance. The result is a damper that provides ultimate chassis and ride height control with maximum mechanical traction. The JRZ standard large 22 mm piston rod works in concert with the high speed valving to maximize blow off valve response. achieving solid chassis control without using a high spring rate.

Features

• Rebound adjustment independent from compression
• Extra large adjustment range
• 12 clicks low speed compression
• 21 clicks high speed compression
• 24 rebound • High response piston
• Precise canister
• Low friction
• Adjustable gas pressure

JRZ 12 31 dampers are shipped with 360 degree swivel hoses and are available with zero-inclusion quick disconnects for mounting canisters within the chassis for ease of adjustment accessibility. Our newest motorsport piston has been developed to deliver a smooth and responsive damping characteristic.  To customize track to track setups and tailor the chassis to the driver; the JRZ 12 31 has an adjustment range able to provide damping to spring configurations ranging from 1.5-6Hz on vehicles with moderate to large aerodynamic loads. Even with a large range. each adjustment is designed to be small. even steps giving precision and confidence when making changes. The JRZ 12 31 is here to take you to the next level. Dedicated racing cars with experienced drivers deserve the professional technology JRZ delivers. With valving designed and innovated by JRZ Suspension Engineering. the JRZ 12 31 is shipped as a custom configuration always tailored to the customer’s needs. and always comes with our world renowned personal service.

Benefits

• Precise control of the chassis and unsprung masses
• Easy to change damping curves
• Large adjustment range. with fine tuning ability

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COMPETITION CLUTCH
Stage 4 Rigid - Strip Series 0620 Clutch Kit

This assembly; available with a six puck rigid plate is good for penetrating engagement with higher horsepower applications. This disc complimented by a performance pressure plate provides up to 250% increase in torque capacity. 300 mile break-in recommended with this set-up.

The 0620 Series kit includes a performance pressure plate; a six puck high torque rigid disc with Ceramic buttons; all applicable bearings; and the appropriate alignment tool.

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Cosworth High Performance Head Gaskets engineered to seal in power under most demanding condits. Constructed from stainless steel with a folded stopper layer; each application features superior sealing compared to conventional multi layer steel gaskets. Additionally; Cosworth High Performance Head Gaskets manufactured from pre-coated cut stainless steel resulting in uniform coating distribution consistent shape.
Key Features
Individual cut layers of stainless steel with superior consistency compared to laser gaskets
Pre-coated stainless steel with a 0.25 micron layer of nitrile rubber ensures consistent distribution of coating with no high or areas
Manufacturing dimensional tolerance of 0.001
Die manufacturing process ensures smooth edges; unlike laser gaskets
Cosworth's gaskets feature a folded stopper layer additional torque around each cylinder. width of sealing area is specific each application thereby providing ultimate sealing properties
Available in a range of thicknesses specific applications Learn More

Cosworth's been engineering camshafts nearly 50 years. That coupled with years of innovative multi valve cylinder head design ensures camshaft designs the most efficient in providing maximum usable power across widest power band. Each is ground from a billet finished using same procedures we in extreme level race engines. Cosworth camshafts the perfect compliment to CNC Ported Valve Cylinder heads. cams profiled to increase boost response thereby increasing engine torque power are fully compatible with CNC Ported Valve Cylinder Heads.
Key Features
Ground from billets
Engineered tested profiles
Broad power band
Compatible with Cosworth ported Valve Cylinder Heads Learn More

Engine bearings one of most vital components within an engine are often overlooked when considering high performance upgrades. Performance engineered; multi-layer bearings generate less heat than normal bearings by reducing friction. Cosworth Race bearing sets feature a unique combination of design; metallurgy engineering to deliver performance in extreme condits. Cosworth Race bearings setsare available in sizes to accommodate most applications. Size 1 bearings a nominal standard size are used most applications. Size 2 bearings feature an additional .001 clearance should be used
when extra clearance is required.
Key Features
High strength overlay plate with reduced thickness better control less friction
Hardened steel backing on connecting bearings
Increased crush better retention
3/4 grooving on Main Bearings providing optimum supply
Tight consistent wall tolerances
Oversize chamfers where applicable
Flash plating eliminated improved heat transfer
Tested to over 1000 horsepower! Learn More

For over 40 years; Cosworth's been leader in innovative multi valve cylinder head design both racing high performance production cars. Cosworth Ported Valve Cylinder head range is latest advancement. Modified from OE cylinder head castings; substantial flow improvements upgraded valve train components offer superior performance your high performance engine.
Each original cylinder head design is carefully evaluated tested to establish improvements required to meet target performance level. Hours of testing flow bench validation used to determine best advanced port design yielding maximum usable power response. However; there is more to cylinder head design than just maximum flow. It is critical that port velocits maintained to ensure drivability valve train components matched to guarantee reliable performance. Once of these factors have been tested validated; final port contour is digitized. Using digitized program; we then reshape both intake exhaust ports using axis mill producing an accurate consistent port shape every time. In addition to reshaping enlarging intake exhaust ports; most Valve Cylinder heads feature a re-shaped combustion chamber to un-shroud valves increasing flow performance. After machining; each cylinder head receives a multiangle high performance valve on precision valve seat cutter. Then each cylinder head is ultrasonically; cleaned; serialized then hand assembled with select high performance valve train components; ready to install on your engine.
Key Features
All OE Castings
Enlarged Intake Exhaust ports
Large diameter stainless steel intake valves
Large diameter Inconel exhaust valves
Hi Rev; Dual valve springs
Titanium Retainers
Hardened Steel spring platforms
Reshaped combustion chamber on most applications
Flow bench proven design
Dyno tested
Machined Cosworth Logo
Precision Multi angle valve job
Pre-assembled; ready to install
Machined port bore finish
Knife edge port divider Learn More